Machine for doubling or twisting yarns, threads, and the like



March 8. 1949. LANQSTRETH 2,463,887

MACHINE FOR DOUBLING QR TWISTING YARNS, THREADS, AND THE LIKE Filed April 19, 1947 3 Sheets-Sheet 1,

- 'IN VEN TOR. flaw/v (fix 57F157 1477' GPA E 7 March 8, 1949. M. LANGSTRETH MACHINE FOR DOUBLING OR TWISTING YARNS, THREADS, AND THE LIKE 3 Sheets-Sheet 2 Filed April 19, 1947 INVENTOR. W54 a/v ZA/VG'STFZTH March 8, 1949. M. LANGSTRETH 2,463,387

MACHINE FOR DOUBLING 0R TWISTING YARNS, THREADS, AND THE LIKE A [ll HTTOP/VEK Patented Mar. 8, 1949 MACHINE FOR DOUBLTNG OB TWISTING YARNS, THREADS, AND THE LIKE Melon Langstreth, Bochdale, England, assignor to Dunlop Tire and Rubber Corporation, Buflalo, N. Y., a corporation of New York Application April 19', 1947, Serial No. 742,600 Great Britain May 3, 1946 7 Claims. (CI. 57-58) This invention relates to a machine for doubling or twisting yarns, threads and the like.

Machines for imparting a. twist to yarn, thread or the like (hereinafter referred to as yarn) are known in which the yarn is caused to follow a looped path between two relatively stationary points, one adjacent to the wind-01f package and the other adjacent to the take-up reel, the loop being rotated by a spindle at its closed end in such a manner that one leg of the loop rotates about the other leg and about the package. Two twists are thus imparted to the yarn for each rotation of the spindle, one between each relatively stationary point and the rotary point. Such machines are known as double twist machines.

Similar apparatus can also be used for doubling yarns by winding the component yarns together on a single cheese so that they lie side by side therein, and then passing them together through the apparatus and thence to a take-up reel.

In British Patent No. 338,570 and in United States Patent No. 1,917,914 of September 11, 1933, an apparatus of this type is described in which the yarn is drawn through a hollow rapidly rotating spindle from a package mounted on a support hanging freely from a sleeve on the spindle, and passes through an opening in a disk rotating with the spindle over the periphery of the disk and thence to the take-up reel.

The support and the spindle are capable of relative movement so that vibration of the package is damped out instead of being allowed to build up to an undesirable magnitude. The support could itself also be made of two or more parts capable of relative movement to assist this efiect.

When the apparatus is in operation the disk causes the loop of yarn to rotate, and the balloon which is formed by the yarn between the disk and the take-up point encloses the package and its support. The size of this balloon thus limits the size of the package which can be accommodated.

To prevent the yarn fouling the package when starting the apparatus a ring-shaped guide may be fixed directly to that part of the support carrying a pin on which the package is placed.

It is stated in the patent that this ring also enables the takeup point to be brought nearer to the bobbin than would be the case if the balloon extended directly from the disk to the take-up point.

With such an arrangement it is not satisfactory to increase the diameter of the ring so that a relatively large package can be accommodated, since'the yarn would then be in contact with the ring when the apparatus was in operation and 4 would exert such a thrust upon it that relatively large vibrations would be set up in the package support system. It would then be impossible to maintain the necessary even tension of the yarn.

My present invention provides a disk doubling machine having a support for the package hanging freely from a sleeve mounted freely on a hollow spindle carrying a rapidly rotating disk on which the yarn passes, and a guide for the yarn independent of the package support, which does not cause undesirable vibrations to be set up in the package support system, and which enables a larger package to be accommodated.

In my present invention I provide a disk doubling machine of the type having a support for the package hangin freely from a sleeve mounted freely on a hollow spindle carrying a rotatable disk over which the yarn passes, and a guide for the yarn disposed between the said disk and the take-up point characterized in that the said guide is supported by the said sleeve independently of the said package support. Ad-

vantageously the size and disposition of the guide are such that the yarn is held away from the package during its passage from the disk to the take-up point when the machine is in operation.

With this apparatus the yarn is caused to pass from the disk rotating with the spindle, to the guide and thence to the take-up point. Vibrations set up in the guide are not communicated to the package support, and thus will not afiect the tension of the yarn. The permissible diameter amount of yarn on packages accommodated In addition,-since the take-up point hitherto. is brought nearer to the disk, a more compact apparatus results and a larger number can be mounted in a given space.

In one embodiment of the invention the guide is a circular member in the form of a fixed disk of diameter approximately that of the rotating disk, and is held in position co-axial therewith by two horizontal arms, each arm being fixed at one end to the-fixed disk and at the other end to 3 a horizontal supporting laterally from diametrically opposite sides of the package supporting sleeve. The arms are on opposite sides of the spindle, being separated by somewhat; more than the diameter of a full package and of such length that the pin for the package is approximately half-way between the end of the spindle and the disk. It is then possible to place on the pin a cheese-shaped package of height and diameter only slightly less than the distance between the spindle and the disk. 7

In a preferred form of the invention a freely swinging massive member or pendulum is attached to the circular member to assist in damping down vibrations which might otherwise build up. Conveniently this massive member is a flat sector or segment-shaped piece of metal whose curved edge is co-axial with the circular'member, and is free to swing about a pin or like pivot fixed to the latter a short distance below its center.

Various modifications of the invention are possible. Again, instead of having a fixed disk the circular member may be a disk mounted freely on a small spindle or peg carried on a framework fixed to the sleeve so that the disk can rotate with the yarn.

The various features of the invention are illustrated, by way of example, in the accompanying drawings in which- Fig. 1 is a perspective view of a disk doubling machine embodying a form of the invention;

Fig. 2 is an elevation of the disk doubling machine of Fig. 1, partly in section, in a plane normal to the disk.

' Fig. 3 is an elevation of the machine of Fig. 1 as seen when looking'from the right of Fig. 2;

Fig. 4 is a plan of an alternative form of the disk doubling machine, partly-in section, in a plane normal to the disks.

Referring first to Figs. 1, 2 and 3, the disk doubling machine comprises a hollow spindle I carrying a disk 2 which rotates with the spindle. The latter is mounted on ball bearings in a mounting 3. The end of the spindle beyond the mounting carries a pulley I6 by which the spindle I and the disk 2 can be rotated, and the other end of the spindle I carries a sleeve 4 forming part of the bobbin support. Ball bearings (not shown) are interposed between the spindle and the sleeve 4, and the latter also carries a tube (not shown) through which the yarn is.

threaded extending co-axially into the hollow spindle. The general internal arrangement of the sleeve land also of mounting 3 is preferably as described with reference to Fig. l of Patent 1,917,914. From sleeve 4 depends a package carrier comprising a massive member 6 freely hinged to the sleeve I at hinge I and from the member 6 projects an arm 5 carrying a pin 8 on which the package 9 can be mounted, the customary arrangement of disks and washer I 4 being interposed to provide the desired drag on the package and set up tension in the yarn. Arm and member 6 thusFtogether form means for supporting the package from the bush or sleeve 4, which means can oscillate about the hinge I.

The sleeve 4 disk II. This support comprises an arm I2 bolted at its central portion to lugs on the sleeve 4, which arm extends horizontally on each side of the sleeve. Two rods I3 project horizontally at right angles to the arm I2, one from each end of it, and the ends of the rods I3 remote also carries a support for a fixed member projecting from arm I2 are secured to the disk II. Disk II thus lies in a-vertical plane parallel to the rotating disk 2 with its center in line with spindle i and is supported from the sleeve l independently of members 5 and 6 forming the package support. The lengths of the arm I2 and of rods I3 are such that there is just room for a full package to be placed on the pin 8. In Fig. 2 a full package 9 is shown in position, while in Fig. l a nearly empty package is shown so that the disposition of the various parts of the apparatus may be more readily illustrated.

A pendulum member Ii is hung from a pin I5 on disk II thereof to damp down vibrations which may be set up in disk II and its supporting members I2 and i3.

The apparatus is also provided with a guide for the yarn comprising a wire member I1 shaped approximately as an inverted Y and attached to the arm I2 with the center of the Y approximately in line with the spindle I, and the latter has a diametral passage I8 disposed between the disk 2 and the sleeve 5 by which the yarn can pass out of the hollow spindle to opening I9 in the disk 2. A guide 20 for the yarn also is provided between the disk 2 and the take-up point or rollers 2!.

When the apparatus is in operation the yarn passes from the package 9, over the outside of guide I'i into the hollow spindle I and out through the passage I8 therein, through hole I9 and thence over the disks 2 and I I to guide 20 and thence to the take-up point 2|. The shape of the wire guide member I1 ensures that the variation in the direction of pull of the yarn on the cheese as it unwinds does not greatly modify the pressurefon the felt disks III and thus the tension of the yarn.

As the doubling operation proceeds the thrust of the yarn on the disk will tend to set up vibrations in the stationary disk II and its supporting members I2 and I3 but these vibrations will in large measure be damped out due to the effect of the pendulum member I4. Moreover since the disk II is supported directly from sleeve 4 and not from the arm 5 or other part of the package system between hinge I1 and spindle 8, the vibrations setup in the disk II and .its supporting members will not be transmitted to the package.

In an alternative form of the invention illustrated in Fig. 4, the disposition of parts I to III, I2, I6, I1 and I8 is the same as described with reference to Figs. 1 to 3. However, instead of having a fixed disk II against which the yarn bears in its passage from the disk 2 to the guide 20, a rotatable disk 2| is provided for that purpose. To support the disk 2|, rods I3 are provided projecting one from each end of the arm I2 horizontally and at right angles to the arm, the second end of each rod I3 being bolted to a cross piece 22 disposed parallel to arm I2. Cross piece 22 berries a bearing 23 on which the disk 2| is rotatably mounted, the axis of rotation of the disk 2| being in line with the axis of spindle I. In thismodiflcation of the invention smaller friction between the yarn and the disk 2I willbe set up since the disk is free to rotate with the yarn, and

less vibration will be set up in the disk 2I and its support on that account. In this form of the invention no pendulum can be placed on the disk 2|. 4

What I claim is:

1. A twisting machine comprising a horizontal rotatable spindle, a rotating yarn guide mounted immediately below -the center on and rotating with said spindle and extending outwardly therefrom, said spindle projecting beyond said yam guide and having a longitudinal passage and side opening to said yarn guide, a stationary sleeve mounted and supported on the projecting part of said spindle to permit free relative rotation between said spindle and said sleeve, a package carrier hinged below the axis of said sleeve and depending from said sleeve, a second yarn guide beyond said package carrier and extending outwardly from the axis of said spindle and a support for said second guidemounted on said sleeve above the hinge connection of said package carrier.

2. The machine of claim 1 in which said yarn guide is a circular member substantially parallel to said rotating disk and co-axial with said spindle.

3. The machine of claim 1 in which said yarn guide is a circular member co-axial with said spindle and in which said support comprises arms connected to said sleeve independently of said package support.

4. The machine of claim 1 in which said yarn 6 guideis a. circular disc and has a pivotally sus-.

pended massive member to dampen vibrations.

5. The machine of claim 1 in which said yarn guide is a circular disc rotatably mounted on said support.

6."I'he twisting machine of claim 1 in which said rotatable yarn guide is a disc having a guide opening.

'7. The twisting machine of claim 1 in which said rotatable yarn guide is a disc having'a yarn guide opening and in which said second yarn guideis a circular disc and in which a mass is pivotally suspended from said second yarn guide within its periphery.

MELON LANGSTRE'I'H.

REFERENCES crrsn The following references are ofrecord in the tile of this patent:

UNITED STATES PATENTS Number Name Date 1,907,530 Ferier a-.. May 9, 1933 1,983,413 Spagnoio Dec. 4, 1934 

